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Longitudinal \(\bar{\Lambda}_0\) polarization in heavy-ion collisions as a probe for QGP formation

  • G. HerreraEmail author
  • J. Magnin
  • L. M. Montaño
theoretical physics

Abstract.

We present an analysis of the longitudinal \(\bar{\Lambda}_0\) polarization in ultrarelativistic heavy-ion collisions. The polarization of \(\bar{\Lambda}_0\)’s coming from the decay chain \(\bar{\Xi}\rightarrow \bar{\Lambda}_0 + \pi\) exhibits a very well differentiated behavior depending on the production region of the primordial \(\bar{\Xi}\)’s. This effect reflects the different values of the \(N_{\bar{\Xi}}/N_{\bar{\Lambda}_0}\) ratio in the QGP region, where nucleon-nucleon interactions take place in a hot and dense environment, and the peripherical region, in which ordinary nucleon-nucleon interactions occur. An increase in the longitudinal \(\bar{\Lambda}_0\) polarization signals a strangeness enhancement which is thought of as a property of the QGP phase.

Keywords

Field Theory Elementary Particle Quantum Field Theory Particle Acceleration Production Region 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin/Heidelberg 2005

Authors and Affiliations

  1. 1.Depto. de Física del Centro de Investigación y de Estudios Avanzados del IPNMéxico D.F.México
  2. 2.Centro Brasileiro de Pesquisas FísicasRio de JaneiroBrazil

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